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Windows Server 2025 Domain Controllers at Risk of Losing Network Connectivity
Key points:
• Microsoft has warned IT administrators that Windows Server 2025 domain controllers may lose network connectivity after restart.
• The issue is caused by the domain controllers reverting to a standard firewall profile instead of using the domain firewall profile after a reboot.
• A workaround is available, but a patch is still in development and expected in a future release.
Microsoft has issued a warning to IT administrators regarding a critical issue affecting Windows Server 2025 domain controllers. The problem occurs when these servers, which host the Active Directory domain controller role, are restarted. After the restart, the domain controllers may not manage network traffic correctly, causing them to become inaccessible on the domain network. This can also allow unauthorized access to certain ports and protocols that would normally be blocked.
According to Microsoft’s Windows release health dashboard update, the issue is caused by the domain controllers reverting to the standard firewall profile instead of using the domain firewall profile after a reboot. This mistake can cause applications or services running on the domain controller or on remote devices to fail or become unreachable on the domain network.
The Impact:
The affected servers will be unable to manage network traffic, and applications or services will fail to function or become inaccessible. This can have significant consequences for companies that rely on these servers, including loss of productivity, data corruption, and potential security risks.
The Fix:
Microsoft has not yet released a patch to fix the issue, but has provided a temporary workaround. The company recommends that administrators restart the network adapter manually each time the server is rebooted. This can be done using the PowerShell command Restart-NetAdapter * or by creating a scheduled task to perform the restart automatically. However, this is a temporary solution, and administrators should be aware that a permanent fix is still in development.
Some important details to consider:
- This issue affects Windows Server 2025 domain controllers.
- The problem only arises when the servers are restarted.
- A permanent fix is expected in a future release.
- Administrators can use the workaround to temporarily resolve the issue until the patch is available.
- Companies relying on these servers should ensure they are prepared to take prompt action if the issue arises.
Microsoft has assured that the company is actively working on a fix for this issue, but in the meantime, IT administrators should be aware of the potential risks and take necessary precautions to minimize disruptions to their network.
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